Something that I wanted to share with all my blog reader.
The revolving swiftlet lure.
If you are faced with summon by the local authority to stop playing those bird call sound just try this special technique.
It mike work but will not promise any miracles that you are hoping for.
It will be something to pull the attention of those wild birds into your BH. Watch them using your CCTV camera and adjust the speed to the most attractive speed to those birds.
In the event those wild birds ignore the gadget in total just remove them from the entrance hole.
You can now play the external sound only inside but not outside.
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